Coronary heart disease
Blood enters the heart through the two main coronary arteries, and through a network of blood vessels on the surface of the heart muscle so that the heart gets nutrients. Cholesterol and fat deposits are formed in the arteries and narrow the passages. This condition is called atherosclerosis. The blood flowing in the arteries forms a blood clot, blocking the arteries. When under physical or psychological stress, the heart beats faster and requires more oxygen and nutrients. This is a condition that the coronary arteries cannot cope with when they are severely narrowed or blocked. As a result, the insufficient blood supply to the coronary arteries leads to angina or heartache. The blood flow to the heart muscle is suddenly reduced due to the clogging of a coronary artery by a blood clot, and a heart attack occurs.
The degree of coronary atherosclerosis varies from severity to severity. Mild lesions have no obvious effect on the heart and do not produce symptoms. Heavier lesions can cause stenosis of the lumen. To a certain extent, although the blood it supplies can meet the daily needs of the myocardium, when the workload of the heart increases (such as strenuous labor or emotional excitement), the blood supply of the myocardium will be insufficient, resulting in angina, arrhythmia and heart failure.
The use of medication or surgery has been able to effectively treat coronary artery disease. Doctors will use various drugs to reduce the burden on the heart muscle and prevent arrhythmia. There are two types of surgical procedures for the treatment of coronary artery disease, one is called coronary angioplasty, which is a minor operation; the other is called coronary artery bypass graft, which is a major operation.
冠状动脉心脏疾病 冠狀動脈心臟疾病
血液经由两条主要冠状动脉进入心脏,并经由心脏肌肉表面上的一个血管网络,使心脏得到养分。胆固醇、脂肪沉积在动脉中形成,使通道变窄,这种情况被称之为动脉粥样硬化。在动脉流动的血液会形成一种血栓,将动脉阻塞起来。在生理或心理受到压力时,心脏会跳得快一些,需要更多的氧气及养分,这是冠状动脉在严重变窄或被阻塞时所无法应付的一种状况。结果造成了冠状动脉供血不足导致心绞痛或心痛。流向心肌的血液由于血栓阻塞了一条冠状动脉而突然大量减少,就会心脏病发作
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